Valve for water-gages



N O S R E K O N C & Y A R DD H W M M m VALVE FOR WATER GAGES.

No. 381,609. PatentedApr. 24, 1888.

7m Q 34 V UNITED STATES PATENT OrEicE.

\VlLLIAM H. BRAY, OF BOSTON, AND CORNELIUS NIOKERSON, OF CHELSEA, M ASSACHUSETTS.

VALVE FOR WATER-GAGES.

SPECIFICATION forming part of Letters Patent No. 381,609, dated April24, 1888.

Application filed January 24, 1888. Serial No. 261,780. (No model.)

To alt 1071,0722 it may concern:

Be it known that we, WILLIAM H. BRAY, of Boston, in the county ofSuffolk, State of Massachusetts, and CORNELIUS NIGKERSON, of

Chelsea, in the county of Suffolk, State of Massachusetts, have inventeda certain new and useful Improvement in Valves, of which the followingis a description sufificiently full, clear, and exact to enable anyperson skilled IO in the art or science to which said inventionappertains to make and use the same, reference beinghad totheaccompanying drawings, forming part of this specification, in which--Figure 1 is a side elevation of a valve embodying our improvement; Fig.2, a vertical longitudinal section of the same, a portion of the. boilerbeing shown in section in both views; and Fig. 3, a view of theauxiliary valve detached.

Like letters and figures of reference indicate corresponding parts inthe different figures of the drawings.

Our invention relates more especially to the class of valves which areused on the gagecocks of steamboilers; and it consists in certain novelfeatures, as hereinafter fully set forth and claimed, the object beingto produce a more effective device of this character than is now inordinary use.

3o I he nature and operation of the improvement will be readilyunderstood by all conversant with such matters from the followingexplanation.

In the drawings, A represents the body of 5 the valve; B, thevalve-stem; C, the handwheel mounted on the valve-stem; D, the gage orglass tube; E, the nut or gasket for packing the tube; F, the petcock;G, the handle mounted on the valve-stem of the petcock;

0 H, the valve proper; J, the seat for the valve proper, and K theboiler, these parts being all of the usual form and construction and notclaimed broadly or when in and of themselves considered in the presentapplication.

5 The ordinary screw-threaded nipple, m, of

the valve, which is fitted into a correspondingly screwthreaded hole inthe boiler, is reduced in size or elongated to form the auxiliary nippleL, which is provided with a wide annular groove, 2, on its periphery.The or dinary duct, 6, in the nipple m is continued through theauxiliary nipple L and is counterbored or enlarged to form a valve-seat,i. An auxiliary valve, M, having its inner end, 15, fitted to the seat13, is secured to the endof the auxiliary nipple L by means of theelastic arms Ir, said arms being provided with hooks d, which rest inthe groove 2 when said valve is in position for use and engage theannular boss on said nipple to prevent the valve from being displaced. Atubular valve-stem, 9', provided with the lateral holes it near itsinner end, is secured to the valve M, said stem being fitted to work inthe duct b. A rod, w, is secured to the inner end of the valve-stem B,said rod being fitted to work loosely in the valve-stem r, and of suchlength that in closing the valve H it will pass through the stem 9* andopen the valve M. v

In the use of our improvement, the valve H being closed and the valve Mopen, with the rod w resting against its inner side, if now the valve His opened by unscrewing or turning out its stem B, the rod 10 is removedfrom contact with valve M and the water in the boiler will pass throughthe holes h and hollow stem 9* into the body A and gage-tube D, and asthe pressure on the valve M will be equal on both sides it will bebalanced and remain open, as shown in Figs. 1 and 2. The auxiliary andmain valves being open, as shown and described, if now the glassgagetube D is accidentaliy broken the pressure of the water on theoutside of the valve M will be removed, whereupon it will be instantlyand automatically closed by the pressure of the water from within theboiler, thereby preventing the escape of the water through the brokentube, and also enabling a new tube to be substituted without shuttingoff the water or steam.

We do not confine ourselves to the use of the elastic arms 7tand boss 3/for securing the valve M to the nipple L, as any suitable means for thatpurpose may be employed.

Having thus explained our invention, what we claim is- 1. In a valve ofthe character described, the nipple L, having an exterior wide annulargroove, 2, forming a boss, y, at its end, and also having a valve-seat,13, in combination with the valve M, arms 70, secured thereto andextending inward past the valve-face, and hooks d on the ends of saidarms adapted to engage said annular groove 2 and boss y, substantiallyas described.

2. Ina valve of the character described, the body A, having nipple m,the auxiliary nipple L, continuing the same and havingavalveseat at itsinner end, a valve, M, adapted to be seated on said seat, and aperforated tube, 1*, connected to said valve and sliding within saidnipples, in combination with the valveseat J, main valve H, closingagainst said seat ina direction opposite that in which valve M closes,and rod 10, continuing said main valve and adapted to open the auxiliaryValve M as the main valve H closes, said rod being guided in said tube1*, substantially as described.

3. In a valve of the character described, the body A and nipple m, theauxiliary nipple L, having the duct 5, boss 1, and valve-seat i, thevalve M, provided with arms 7c, having hooks d, the hollow valve-stem0", connected with the valve M and provided with the holes h, and thevalve H, provided with the rod w, all combined and arranged to operatesubstantially as set forth.

\VILLIAM H. BRAY. CORNELIUS N IOKERSON. Witnesses:

O. M. SHAW, E. M. SPINNEY.

